Abb Schweiz Ag

Hitachi Energy Switzerland Ag

Radoslaw Jez

Mats Hyttinen

Wojciech Piasecki

Michal Lazarczyk

Filip Grecki

Magdalena Ostrogorska

Hongbo Jiang

Marcin Czopek

Marcin Szewczyk

Pawel Aloszko

Krzysztof Obrebski

Pawel Dawidowski

Göran Brorsson

Krzystof Obrebski

The subject of the application is a power electronic tap changer module for transformer using power electronic elements connected to sections of a primary winding of the transformer. The power electronic tap changer module is equipped with valves having a pair of a thyristor or transistors connected with a controller and the valves are connected in series with the fuses, respectively. The module is equipped with an additional oversized tap line having an oversized valve rated for short circuit current, which valve is connected with an overvoltage triggering circuit. The oversized valve is equipped with a pair of thyristor or transistors connected with a thermally protected voltage suppressing device.

Power electronic tap changer module for transformer

Embodiments are generally based on employing a power transmission line in a HVDC link to provide auxiliary power to one of the ends of the HVDC link for facilitating a black start thereof when the HVDC link is de-energized, i.e. when at least one of the HVDC converter stations is de-energized and there is no transmission of power between inverter and rectifier HVDC converter stations on each side of the HVDC link. A relatively small amount of power can be conveyed towards one of the HVDC converter stations via the power transmission line so as to provide power to any auxiliary system(s) of the converter station, for example prior to a black start of the converter station being carried out.

Power transmission arrangement and method for operating a power transmission arrangement

Growing community of inventors

Zory, Poland

Radoslaw Jez